Skip to main content

More learning opportunities

This post is a minor update on the last Learning Opportunities entry.  I have learned SO MUCH over the last two years, it's been an amazing experience.

Some of my new reading is:

  • Operations Management textbook (very surprised as to how enlightening it is to see perceived "IT" problems being highlighted in a completely different context/industry)
  • Business Model Generation: A Handbook for Visionaries, Game Changers, and Challengers
  • The Startup Owner's Manual: The Step-By-Step Guide for Building a Great Company
  • The Innovator's Dilemma (super interesting read so far)
=Everyone should check these out=
  • DevOps Kaizen (be good at getting better):
  • (this concept is huge) From Design Thinking to DevOps and Back Again: Unifying Design & Operations:
  • The Case for Continuous Delivery:
  • Stop Hiring DevOps Experts and Start Growing Them by Jez Humble:
  • DevOps Demystified with Ben Rockwood:
  • Personal Kanban:
  • Modern Cloud-based platform:

=Below are new entries to all categories=

  • LISA Conversations: Ben Rockwood:
  • The Cynefin Framework:
  • Jez Humble Keynote:
  • Siren of Shame:
  • DevOps Whiteboard Client Interview Demo:
  • Agile Product Ownership in a Nutshell:
  • Applying value streams in a DevOps enviro: a lean IT case study:
  • LKNA14: Dave Snowden - Think Anew, Act Anew:
  • A Practical Overview of Desired State Configuration:


  • (haven't listened to yet, but looks promising)
  • (haven't listened to yet, but looks promising)

=Recommended reading=

  • Lean IT (Bell, Orzen)
  • More Agile Testing (Gregory, Crispin)
  • Continuous Delivery (Humble, Farley)
  • The Practice of Cloud System Administration (Limoncelli, Chalup, Hogan)
  • Test-Driven Development (Beck)
  • Continuous Integration (Duvall)
  • Web Operations (Allspaw, Robbins)


Popular posts from this blog

DFSR - eventid 4312 - replication just won't work

This warning isn't documented that well on the googles, so here's some google fodder:

You are trying to set up replication for a DFS folder (no existing replication)Source server is 2008R2, 'branch office' server is 2012R2 (I'm moving all our infra to 2012R2)You have no issues getting replication configuredYou see the DFSR folders get created on the other end, but nothing stagesFinally you get EventID 4312:
The DFS Replication service failed to get folder information when walking the file system on a journal wrap or loss recovery due to repeated sharing violations encountered on a folder. The service cannot replicate the folder and files in that folder until the sharing violation is resolved.  Additional Information:  Folder: F:\Users$\\Desktop\Random Folder Name\  Replicated Folder Root: F:\Users$  File ID: {00000000-0000-0000-0000-000000000000}-v0  Replicated Folder Name: Users  Replicated Folder ID: 33F0449D-5E67-4DA1-99AC-681B5BACC7E5  Replication Group…

Fixing duplicate SPNs (service principal name)

This is a pretty handy thing to know:

SPNs are used when a specific service/daemon uses Kerberos to authenticate against AD. They map a specific service, port, and object together with this convention: class/host:port/name

If you use a computer object to auth (such as local service):

If you use a user object to auth (such as a service account, or admin account):

Why do we care about duplicate SPNs? If you have two entries trying to auth using the same Kerberos ticket (I think that's right...), they will conflict, and cause errors and service failures.

To check for duplicate SPNs:
The command "setspn.exe -X

C:\Windows\system32>setspn -X
Processing entry 7
MSSQLSvc/ is registered on these accounts:
CN=SQL Admin,OU=service accounts,OU=resources,DC=company,DC=local

found 1 groups of duplicate SPNs. (truncated/sanitized)

Note that y…

Logstash to Nagios - alerting based on Windows Event ID

This took way longer than it should have to get here's a config and brain dump...

You want to have a central place to analyze Windows Event/IIS/local application logs, alert off specific events, alert off specific situations.  You don't have the budget for a boxed solution.  You want pretty graphs.  You don't particularly care about individual server states.  (see rationale below - although you certainly have all the tools here to care, I haven't provided that configuration)

ELK stack, OMD, NXlog agent, and Rsyslog.  The premise here is as follows:

Event generated on server into EventLogNXlog ships to Logstash inputLogstash filter adds fields and tags to specified eventsLogstash output sends to a passive Nagios service via the Nagios NSCA outputThe passive service on Nagios (Check_MK c/o OMD) does its thing w. alerting
Open Monitoring Distribution, but the real point here is Check_MK (IIRC Icinga uses this...).  It makes Nagios easy to use and main…